I have not been Space Master in this game system yet however being a player I find this game really intuitive. It is a great group game that gives everyone a chance to catch the spotlight (as opposed to having the ranger and rogue fighting over who gets to do the stealth mission etc etc). The combat and non combat rules are cinematic and fun along with the backstory and random background set up.

All this from a free game makes it an incredible rules set. Go download it.

A very helpful supplement. I much prefer having a printed copy for gaming, and will likely buy one in the future, but the PDF is great for looking up random ideas I have while out and about. And it was free! Very nice.

While there are a lot of interesting facets to this game, this big book left me with the feeling that the battle system was lacking and that I would have difficulty recruiting players for an old school style game like this.

While I do not have that much experience with the mechanics of the game itself, the book itself is something definately worth having. The thing I found the most interesting is the faction mechanics that it has. It may be sci-fi themed, but it can be adapted to any setting with a bit of a work, providing an actual living game world.

If you are looking for good tips on how to create a space sandbox, you should read this book. Even if the ruleset is not your cup of tea, the procedures and advice is great and mostly system-agnostic. Worth infinitely more than the "free" price tag!

Absolutely fantastic - a really nice system if you like OD&D and the GM's sections on system creation are excellent (and pretty much system agnostic).

Also, the hard cover print of this is a thing of beauty. One word of warning - the print edition contains the extra chapters from the Core edition, but the pdf is just the free edition and doesn't contain the extra chapter on robots and mechs.

I don't like the FATE system, and would prefer not to play a SciFi RPG in an established universe (SW EU, Firefly, etc) and Stars Without by Number is the closest "freeform" universe system you can get that I've found

Game was great, much more open ended than other games i've played (4e , Swords and wizardry) Easy to set up characters with auto-fill character sheet and lots of third party support for world creation ect.

This book is great! 210 free pages of all you need. From a book standpoint it's clear, easy to read and well organized. I am definitely interested in purchasing more material for this system just from a quick read. 5 stars for being a awesome value at an unbeatable price.